Add ol.view.Attribution
This commit is contained in:
Tom Payne
312
src/ol/view/attribution.js
Normal file
312
src/ol/view/attribution.js
Normal file
@@ -0,0 +1,312 @@
|
||||
// FIXME handle rotation
|
||||
// FIXME probably need to abstract out a "layers listener"
|
||||
// FIXME handle layer order
|
||||
// FIXME handle not-ready layers
|
||||
|
||||
goog.provide('ol.view.Attribution');
|
||||
|
||||
goog.require('goog.dom');
|
||||
goog.require('goog.dom.TagName');
|
||||
goog.require('goog.events');
|
||||
goog.require('goog.events.EventType');
|
||||
goog.require('goog.style');
|
||||
goog.require('ol.Collection');
|
||||
goog.require('ol.CoverageArea');
|
||||
goog.require('ol.Layer');
|
||||
goog.require('ol.MapProperty');
|
||||
goog.require('ol.View');
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @constructor
|
||||
* @extends {ol.View}
|
||||
* @param {ol.Map} map Map.
|
||||
*/
|
||||
ol.view.Attribution = function(map) {
|
||||
|
||||
goog.base(this, map);
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Element}
|
||||
*/
|
||||
this.ulElement_ = goog.dom.createElement(goog.dom.TagName.UL);
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Array.<number>}
|
||||
*/
|
||||
this.layersListenerKeys_ = null;
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Object.<number, ?number>}
|
||||
*/
|
||||
this.layerVisibleChangeListenerKeys_ = {};
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Object.<number, Element>}
|
||||
*/
|
||||
this.attributionElements_ = {};
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Object.<number, Array.<ol.CoverageArea>>}
|
||||
*/
|
||||
this.coverageAreass_ = {};
|
||||
|
||||
goog.events.listen(map, ol.Object.getChangedEventType(ol.MapProperty.CENTER),
|
||||
this.handleMapChanged, false, this);
|
||||
|
||||
goog.events.listen(map, ol.Object.getChangedEventType(ol.MapProperty.LAYERS),
|
||||
this.handleMapLayersChanged, false, this);
|
||||
|
||||
goog.events.listen(map,
|
||||
ol.Object.getChangedEventType(ol.MapProperty.RESOLUTION),
|
||||
this.handleMapChanged, false, this);
|
||||
|
||||
goog.events.listen(map, ol.Object.getChangedEventType(ol.MapProperty.SIZE),
|
||||
this.handleMapChanged, false, this);
|
||||
|
||||
this.handleMapLayersChanged();
|
||||
|
||||
};
|
||||
goog.inherits(ol.view.Attribution, ol.View);
|
||||
|
||||
|
||||
/**
|
||||
* @inheritDoc
|
||||
*/
|
||||
ol.view.Attribution.prototype.getElement = function() {
|
||||
return this.ulElement_;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.Layer} layer Layer.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayerAdd = function(layer) {
|
||||
|
||||
var layerKey = goog.getUid(layer);
|
||||
|
||||
var map = this.getMap();
|
||||
var mapIsDef = map.isDef();
|
||||
var mapExtent = /** @type {ol.Extent} */ map.getExtent();
|
||||
var mapProjection = /** @type {ol.Projection} */ map.getProjection();
|
||||
var mapZ = 10; // FIXME
|
||||
|
||||
var layerVisible = layer.getVisible();
|
||||
|
||||
this.layerVisibleChangeListenerKeys_[layerKey] = goog.events.listen(
|
||||
layer, ol.Object.getChangedEventType(ol.LayerProperty.VISIBLE),
|
||||
this.handleLayerVisibleChanged, false, this);
|
||||
|
||||
goog.array.forEach(layer.getStore().getAttributions(), function(attribution) {
|
||||
|
||||
var attributionKey = goog.getUid(attribution);
|
||||
|
||||
var attributionElement = goog.dom.createElement(goog.dom.TagName.LI);
|
||||
attributionElement.innerHTML = attribution.getHtml();
|
||||
|
||||
var attributionVisible = mapIsDef && layerVisible &&
|
||||
this.getAttributionVisiblity_(
|
||||
attribution, mapExtent, mapZ, mapProjection);
|
||||
goog.style.showElement(attributionElement, attributionVisible);
|
||||
|
||||
this.ulElement_.appendChild(attributionElement);
|
||||
|
||||
this.attributionElements_[attributionKey] = attributionElement;
|
||||
|
||||
}, this);
|
||||
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.Layer} layer Layer.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayerRemove = function(layer) {
|
||||
|
||||
var layerKey = goog.getUid(layer);
|
||||
|
||||
goog.events.unlistenByKey(this.layerVisibleChangeListenerKeys_[layerKey]);
|
||||
delete this.layerVisibleChangeListenerKeys_[layerKey];
|
||||
|
||||
goog.array.forEach(layer.getStore().getAttributions(), function(attribution) {
|
||||
var attributionKey = goog.getUid(attribution);
|
||||
delete this.coverageAreass_[attributionKey];
|
||||
var attributionElement = this.attributionElements_[attributionKey];
|
||||
this.ulElement_.removeChild(attributionElement);
|
||||
delete this.attributionElements_[attributionKey];
|
||||
}, this);
|
||||
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {goog.events.Event} event Eveny.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayerVisibleChanged = function(event) {
|
||||
|
||||
var map = this.getMap();
|
||||
var mapIsDef = map.isDef();
|
||||
var mapExtent = /** @type {ol.Extent} */ map.getExtent();
|
||||
var mapProjection = /** @type {ol.Projection} */ map.getProjection();
|
||||
var mapZ = 10; // FIXME
|
||||
|
||||
var layer = /** @type {ol.Layer} */ event.target;
|
||||
|
||||
this.updateLayerAttributionsVisibility_(
|
||||
layer, mapIsDef, mapExtent, mapZ, mapProjection);
|
||||
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.CollectionEvent} collectionEvent Collection event.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayersInsertAt = function(collectionEvent) {
|
||||
var layers = /** @type {ol.Collection} */ collectionEvent.target;
|
||||
var layer = /** @type {ol.Layer} */ layers.getAt(collectionEvent.index);
|
||||
this.handleLayerAdd(layer);
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.CollectionEvent} collectionEvent Collection event.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayersRemoveAt = function(collectionEvent) {
|
||||
var layer = /** @type {ol.Layer} */ collectionEvent.prev;
|
||||
this.handleLayerRemove(layer);
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.CollectionEvent} collectionEvent Collection event.
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleLayersSetAt = function(collectionEvent) {
|
||||
var prevLayer = /** @type {ol.Layer} */ collectionEvent.prev;
|
||||
this.handleLayerRemove(prevLayer);
|
||||
var layers = /** @type {ol.Collection} */ collectionEvent.target;
|
||||
var layer = /** @type {ol.Layer} */ layers.getAt(collectionEvent.index);
|
||||
this.handleLayerAdd(layer);
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleMapChanged = function() {
|
||||
|
||||
var map = this.getMap();
|
||||
var mapIsDef = map.isDef();
|
||||
var mapExtent = /** @type {ol.Extent} */ map.getExtent();
|
||||
var mapProjection = /** @type {ol.Projection} */ map.getProjection();
|
||||
var mapZ = 10; // FIXME
|
||||
|
||||
var layers = map.getLayers();
|
||||
layers.forEach(function(layer) {
|
||||
this.updateLayerAttributionsVisibility_(
|
||||
layer, mapIsDef, mapExtent, mapZ, mapProjection);
|
||||
}, this);
|
||||
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @protected
|
||||
*/
|
||||
ol.view.Attribution.prototype.handleMapLayersChanged = function() {
|
||||
if (!goog.isNull(this.layersListenerKeys_)) {
|
||||
goog.array.forEach(this.layersListenerKeys_, goog.events.unlistenByKey);
|
||||
this.layersListenerKeys_ = null;
|
||||
}
|
||||
var map = this.getMap();
|
||||
var layers = map.getLayers();
|
||||
if (goog.isDefAndNotNull(layers)) {
|
||||
layers.forEach(this.handleLayerAdd, this);
|
||||
this.layersListenerKeys_ = [
|
||||
goog.events.listen(layers, ol.CollectionEventType.INSERT_AT,
|
||||
this.handleLayersInsertAt, false, this),
|
||||
goog.events.listen(layers, ol.CollectionEventType.REMOVE_AT,
|
||||
this.handleLayersInsertAt, false, this),
|
||||
goog.events.listen(layers, ol.CollectionEventType.SET_AT,
|
||||
this.handleLayersSetAt, false, this)
|
||||
];
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.Attribution} attribution Attribution.
|
||||
* @param {ol.Extent} mapExtent Map extent.
|
||||
* @param {number} mapZ Map Z.
|
||||
* @param {ol.Projection} mapProjection Map projection.
|
||||
* @return {boolean} Attribution visibility.
|
||||
* @private
|
||||
*/
|
||||
ol.view.Attribution.prototype.getAttributionVisiblity_ =
|
||||
function(attribution, mapExtent, mapZ, mapProjection) {
|
||||
|
||||
var attributionKey = goog.getUid(attribution);
|
||||
|
||||
var attributionVisible = true;
|
||||
|
||||
var coverageAreas;
|
||||
if (attributionKey in this.coverageAreass_) {
|
||||
coverageAreas = this.coverageAreass_[attributionKey];
|
||||
} else {
|
||||
coverageAreas = attribution.getCoverageAreas();
|
||||
if (!goog.isNull(coverageAreas)) {
|
||||
var transformFn = ol.Projection.getTransform(
|
||||
attribution.getProjection(), mapProjection);
|
||||
if (transformFn !== ol.Projection.cloneTransform) {
|
||||
coverageAreas = goog.array.map(coverageAreas, function(coverageArea) {
|
||||
return coverageArea.transform(transformFn);
|
||||
});
|
||||
}
|
||||
}
|
||||
this.coverageAreass_[attributionKey] = coverageAreas;
|
||||
}
|
||||
|
||||
if (!goog.isNull(coverageAreas)) {
|
||||
attributionVisible = goog.array.some(
|
||||
coverageAreas,
|
||||
function(coverageArea) {
|
||||
return coverageArea.intersectsWithZ(mapExtent, mapZ);
|
||||
});
|
||||
}
|
||||
|
||||
return attributionVisible;
|
||||
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @param {ol.Layer} layer Layer.
|
||||
* @param {boolean} mapIsDef Map is defined.
|
||||
* @param {ol.Extent} mapExtent Map extent.
|
||||
* @param {number} mapZ Map Z.
|
||||
* @param {ol.Projection} mapProjection Map projection.
|
||||
* @private
|
||||
*/
|
||||
ol.view.Attribution.prototype.updateLayerAttributionsVisibility_ =
|
||||
function(layer, mapIsDef, mapExtent, mapZ, mapProjection) {
|
||||
var layerVisible = layer.getVisible();
|
||||
goog.array.forEach(layer.getStore().getAttributions(), function(attribution) {
|
||||
var attributionKey = goog.getUid(attribution);
|
||||
var attributionVisible = mapIsDef && layerVisible &&
|
||||
this.getAttributionVisiblity_(
|
||||
attribution, mapExtent, mapZ, mapProjection);
|
||||
var attributionElement = this.attributionElements_[attributionKey];
|
||||
goog.style.showElement(attributionElement, attributionVisible);
|
||||
}, this);
|
||||
};
|
||||
Reference in New Issue
Block a user